Analysis on Impact of Land Use Change on Urban Waterlogging Caused by Floods

In recent years, ultra-high-intensity rainfall at home and abroad has caused frequent urban waterlogging disasters, posing a severe threat to people’s lives, property city’s safety. Based on the satellite image data of Shanghai Waigaoqiao Free Trade Zone in different periods Storm Water Management Model (SWMM), this paper establishes model heavy under underlying surface complex city, analyses topographic features, land use types, infiltration intensity characteristics drainage pipe network. The rainwater accumulation rainstorms urbanization levels is simulated analysed. research results show that rainstorm closely related changes. With increase impermeability intensity, risk study area tends increase: From 1994 2019, construction increased from 2.5096km 2 5.8662km area. Compared with 1994, same conditions, flooding node runoff coefficient 2019 both significantly.